Sound-box.



W. A. CHAPMAN.

SOUND BOX.

APPLICATION FILED 00T. 28, .1.908.

jammed Bec.

yand a resident of Smithi'ille.

k Pim Tam earner-ronnie@ irc/mman amena' enfrentan, orSMITHVILLEARKANSAS.

Seelen-nox.

Specification of Letters Patent. Patented Dec. 141, 1909.

'agipncatioaai'ea ocmberzaiees-. sei-1111150459387.

fo all whom it may conserva: Y

it known that l, WILLIAM ALBERT (lineman, citizen of thevUnite'd,States, in the County of Lawrence and State ofirkansas` have incan swingtransversely ot the plane of the diaphragm, and wl'ierehy the diret-tionot' pressure upon the har, dne to the weight ot the box and the drag ofthe needle upon the reeord, is snirstantiali' is in the inriintahoixierative position, preterahly at an angie ot' l5@ with thehorizontal.

yThe invention also includes means for rennrvahly attarhing the needlepoint to the stylus har and 'Forinoi'inting the diaphragm in the easing.i

in ohjert of the invention is to provide a simple. inexpensire andetlieient sound hox 't'or ieprraluring or recording the sounds hy meansyot rwrord. employed in phouographs, talkingr niaehines and similarapparatns hy ineans ot' which the sounds can he reprodrifted withrlearnesss and (listini-toilets.:and

'with all their original tona/l/(inalitiem and in whirh the reif-'livelyniovald yanhjerted to exeessiye wear.

A 'further object of tire inventioniis to provide a derive oi the elassdeneriheiit. whieh is so arranged that it eau he einpioyed ai a normallyoperative angie o t"h tween -ll and e parte'- are not this inelinationdoesI not'tend io distort or unnatnrally strainthe Stylo# hir. thenieanSy for mountingp it and the diaphragm. and in whirh .the paris areo ronnerled that they :intoniatiealiy and resiliently adinet themselijesto the Varionr#y movementL neeewary in the reprodnetion and rei-ordinerof sound@` `still further ohieet oi' the invention ihto vertical whenthe ho):

l l i l l l l i i i i providea Sound box in which the diaphragmismounted in a Suitable manner, having; :fi-d4 l)attenti to the back, aback plate. provlded with a central opening and tapered inwardly to the*opening, to permit the diaphragm to 4vibrate freely While the plateduring certain vibrations presents lits face Substantially parallel tothe adjacent face of the diaphragm, and in which the stylus bar adaptedto receive the needle points and is provided with means for keeping theneedle points in plaeeso' that they can he instantly `attached ordetached, without difiieulty.

has a reeess Another object of the invention is to provide a sound boxin whieh the stylus har is' mounted to roel( freely transversely of theplane of the diapl'n'aain. on .eonieal fnlerinn points located in theline of the resistanee to motion due to the wei` on the point otl theneedle` and the dragging;r of the needle on the reeorih and whieh isprovided with auxiliary supportaI -in the -forni ot' hallfs' or rollersresiliently held in ght ot' the hox restingy 70 are on enffae'inff seatsn'ovided therefor 75 h n n near the ends of laterally. extended portion`oi the etylnshar, whereby is afforded a aryingr eontaf'tor irir'tionalengagement as tht` har rochaI under the impulser: eonnnnniealed theretohy the needle in traversingthe sound Arooyw of the reeord, ineonsernlenre ot' which the resilient positioning ot' the styliny har'autoniatiealiy adjuntav itseliE to the varying` positions andniorenientsot' the parts.

The invention ronaists in the eonsiruetion and eonihination ot parts'tohe more fully deserihed hereinafter and partirularly set t'orth in therianne.

i views, and in whieh- 50 with ref-:peet to the horm'niiai. in whiri:

le'i'ore noeeedino' to a more detailed dei srription ot niy invention.it yuhould he I the. points 31 are "so formed that tensions areoutwardly l, quently, what' ,fthe sound box is At. each side of the armthe yolre has a taered recess or .seat 29, whichvreceives a fulbiiimpoint 31 carried by an extension 30 rigid with thecasing ot' the box..lhe exand laterally disposed as is shown mpst clearly in lfig. 1, andthey ext/end at angles of -subs'tfmtially 45 with a line drawn from apoint intermediate the points 31 to the center of the casing; that is,at angles of 45 with the length ot the stylus bar. The tapered recessesQ9 are simi larly inclined aty angles 'of 45. Consearranged 1n itsoperatitQe'posit-ion, which, too, is at an angle of prcfieiiably'lo withthe horizontal, the pressure of the yoke against the iiulcrum points isupward; that is, in a substantially vertical direction, owing to theinclination of the fulcrum points and the seats therefor with respect tothe length of the stylus bar. It will of course, be understood that theangie of inclination and the angles which the l fulcruin points makewith the iengthot the erswith the stylus bar is 'and downwardlydisposed.

stylus barneed notbe exactly't'g, and these angles may be between 4G and500 with substantial'ly no diti'ere'nce in the operation and efficiencyof .the device. Hereattcr, where I refer to this angle asbeing,- 45o itwill be understood-that this value isapproximate,

land may be varied somewhat with special conditions and-under dliicrent.crrciunstances.

The yoke 25 may be curved, for example .as shown in the drawings, torender it artistic in appearance and at the same time to provide end"tages 32, wiich are outwardly` he end. iaccs have recesses formingseats land adapted desired, they to receive spherical rollers/orbearingballs 34. Substantially Qa-shaped"resilient members or springs are4secured upon the sound box casing at opposite sides of the s tyhis barand may be mounted in place by any suitable means, for example, by theuse of screws 36. fit the free ends, the keepers are enlarged toterminate inv sockets 37 having recesses 38 which the balls 34. Thesprings thus serve to hold the stylus bar in piace andto maintain theyoke in suitable movable engagement with thefulcrum points 31, to permitthe i to rock or oscillate freely, transversely o inc plane of thediaphragm.' lThe. sprii owing to their form', cause an inward and upwardpressurezior maintalninuj the stylus bar operatively on position againstpoints.' The engagement of 'tulcruin the spring lreepa movable one, theball and socket parts to adjust themto variations fn pres The engages fent engenand thus does not tend to owingto the provision of joints, andallows the selves automatically sure andA position. ders little frictioninterfere with the freedom ot' movement of the 'stylusrban The balls 34may be fashioned from any suitable material preferably from glass or thelike, though ot course may consist of steel balls.' ulcrum points 31 maybe of hardened steel butare preferably of some noirmetallic substancesuch as agate or quartz. The back plate 20 is preferably t0o,`o anon-metallicl substance and is cemented in position; The recesses 29 maybe lined with a suitable nonmetallic substance similar to thatformingthe fulcrum points 31. The springs owing to their S-shape causean inward and upward pressure.

rlhe barrel has a longitudinal 'recess 31) therein and which is formedto receive the reproducing' points or needles 4() cording` tool. Thebarrel has a second `opening therethrough and arranged transverse ot therecess 89, and intersectingr the same. A locking bolt or member '42.ismovably arranged in the opening 41 and has a .threaded end 43 upon whichis mounted a thumbq nut 44. The opposite end ot the member 42 projectsfrom the barrel and has an opening 45, in to which extends the end of acurved spring' 46, the latter being sccured in place upon the yoke bymeans ot' a screw 47 or in any other convenient manner. The member 42has a notch 48 adapted to engage the shank of the needle to jam the sameagainst the side of the 'recess 39 when the bolt is suitably positionedfor this purpose by means ot the jam nut 44. The cylindrical form of thenut permits the spring 46 to move the member 42 across the recess 39 sothat the needle point can be easilywithdrawn. A partial turn of thethumb-nut which draws the member 42 along the opening 41 against thetension of the spring- 46, instantly clamps in place in 'the barrel, aneedle point, vwhich engages the notch 48. i

Having' thus described my invention, l claim new, and desire to secureby Letters Patent:

1. In a sound box, a diaphragm, a'stylus bar controlling saiddiaphragn'i and havingr a yoke at substantially right angles thereto.and a ulcrum engaging said yoke, whereby said bar is mounted to swingtransversely of the plane of said diaphragm, said fulcrum being at anacute angle with the direction of the length o-t said bar, said barlyingr in a plane substantially parallel to that of said diaphragm.

' 2.' ln a sound box, acasingga diaphragm therein. a stylus bar lying'in a plane substantially parallel to that or said diaphragm. a ulcrumpoint at each side of said bar and rigid With said casing, said stylusbar haring seats adapted to receive said points, said seats and said-points haviugthe directions oit their lengths at angles of 450 with theit so The 3,. in :i minnil linx. :i mining imxing rigid Iziviniijviniizifsii ilnli'rinn poins, :i 'yins may iimi'niifiiini'v sziiii pnintnand having si izlim'niij; .xivndvii Volw :ii sniisiinniiniy i'igggin.nngics in said liar und lnesenting seats adapted to wxh-ivi. :mid pninn,said .senin lining iziei'aiiiy inciined, :i diaphragm in saiiii mining.:i rstyinn :wm secured to Suid dinplnmbn and rigid with said Stylus,bin, nini ivraiiion ineniiicis engaging Said Siyius im' \'-:i1 -ioi miinwniii nini upward pressure is @Karimi tliiivzigninsi..aidb r-yimg in nnime' "lfmiii'nifiiy pms: ilil'i finit. (if said 'ingiinn'gin.

i. in n Sonnzi box. :i cursingq a .#:'yins bzw pi'vfinily Carried in.".unid casing. @diaphragm lwiiiin .unid f lingf and controlled by saidsi'yins im', n i', iiieni keeper carried by said n; zing, :ind :inienibar iiioseiy girisitioned bei anni kfeenei' und snidsyins bar niniin iging mnh (if the saine.

in n nomini box, ai Casing, :i diaphragm iii@ a syins Das" pivnicd uponSaid misinf; anni having iai'emi axensions, spring ifuenws ifiiiin'zi bysiiiii casing and. @zich an end. miricent in 'the end of one und rollersbetween sain] 'zi keep-ars and engaging i); mini syins imi' 1S i00-ielyi .nii boar., u inning, a diaphragm i3' mf'iined uii'frnni points Sing,a sawins bay ha, 'ing a nui a. styinn iiim rigid iiei'eiii n 'inliingdiaphragm', mi@ yo: invinff nirns zilnpind tu receive said @winken saidmkv en' The ends having further wais. sf, n'in.;' kenne-rs innnnivii.upon said Casing and niinniing in mula-tm @zich inijmeni in mw of anni'ni'lrer 5min of sind ,i

i. Yin n snnnd iinx. :1. mining', :i iiinpimnini 'ins imi' mm- .wifi011511155 ni iii@ in inning .i pini@ iiinniinii); nipnsiiu Riu* :imnfing; .having si imck.

a gasket wmnn said adjacent to sii imsk, a dinpiiingm @n sid gasket,means for holding .Caid diaphragm in nnsniinn 'upon said gasket, and iiback plain nniween said buck :ind Said diaphragm nm1 innen-e6 from theperiphery io'wfi-( canin?.

1.0. in ai :mimi im.; :i casing in Aving n back pi'nvifiod with :icamini. opening. n gasket Within said casing mijncen to said back, :idiaphragm on simi gasket, n. sea-ond gaSk-e n said diaphragm. means; foihoiciing said 'Second gasketin pnsiifin, and back piae secured o Saidback and engaging sind first gasket at the innid-f heieo, Suid back'plate having an Openingi'iegistering with said iii-st opening and beingtapered funn Hi@ pc 'ipnezy i'o sni'fi opening.

il. 'in a. smmii hmz, a Styiiis bai having n barrel pmvided 'with nnopening, :i longitudinal ecess .fidapeii to ieciive :i neeiiie point.said bziri'ei having n transverse @perkA ing intersecting said ieces., niociinfg bult movzibi in said traum* 1'12 owning an@ imi# ing aprojecting ihiendeii portion, a nui upon said i'hiendefi puriic'n, saidlocking boit having a unich adap'e," to engage :1 nes ie point, and aresilient manine? eng-ag; ing :mid locking bolt at the and remote fromsaid notch and winding izo move said bolt iongit'udinaily of saniopening.

1G. n. a. sounfi boxv n. casing, n .iinphagm hei'ein, i'igid, iaterniiyamending fniciinn pointscarrid by; sind casinglzin iiisposed in thepinne/0f die ciinphrngm, a syins bar intermediate sind points anfinivinga, iaiteially 'extending yoke provided with a face trunsvei'ne of ihnlang-fh. @if cnid Stylus bzw, said face being provided xviii?. seatsadape to recivn said. pniinnA sind seais iwing; kier-- ail); inclined indirections dingninnl :G inni of the length of :said stylus. im". sindre'- silient meiniieln @gagging snif! yoke. Wheneiiy' an inward undn'pwziiiipivssne is {eX-- ered ihoiimgaiin "iie face of smid yoke lyingin f1 piane 1.. ins-wwe i0 the lnggii of said syins bnr., snif! imi'iyini in a, pian@ sniistuniiaily pninilei to ir-.n nf Sni (iin--pin'iign sn mi of du iinghhof .wid mit@ mii sind nur, will imi' boing'ni :i pian@ sniisinntmiiy parin iinii n? .nml iiniimifigin.

iinfwin :it nach side ni' anni lli said casing, a stylus hai' having ayoke, and ment with said lioinla, said poinl l lying .in a -seatstherein adapted to i'eeeivesaiil poix1ts, "line at snhslanlially rightvanglwv lo lhe said Seats and Iaid points ha ving fhe (lil'eclengthsI ofy aid hai'. tions of their lengths iadiallv disposed at'an In testimonywhereof I have Signaal m 5 angle of 45 with the length of said har, andname to thisl spevifvation in the ln'esvnve ol' 15 movable membersengaging atthe endel of two ,subscribing \\'itne.

eaid'yoke, and a resilient member engaging 'ILLLXM Alllllll'l(ll.\l.\l.\ each of said members :inthe-ends of eaid W'itnesee: yoke, tohold the same in engagement with ll. (j. S'lnimimx.

10 said yoke, and to hold v@aid yoke in engage- J. E. Moomc.

